Law & Order: You're a game-changing, franchise-spawning series. You do what you do very well for 20 years. One more year and you'll pass Gunsmoke in the TV record books, and nobody will have Google Gunsmoke ever again. But no! NBC cancels you just short of the winner's circle. For all of TV eternity, you'll walk hand in hand with Miss Kitty—and now everybody's gonna have to Google Miss Kitty, too! Talk about unsatisfying endings.

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